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Safety precautions during mining blasting

July 05 , 2022

Safety precautions during mining blasting Due to careless prevention, mine blasting often causes serious safety accidents, causing serious loss of personnel and property. What should be paid attention to in mine blasting safety? Pay attention to the following safety points during mine blasting: Preventive measures for safety accidents caused by detonating tubes: 1.There must be no dead knots in the detonation pipe network. There should not be any seams in the hole. 2.When using a detonator to detonate the detonating net, the end of the detonating tube cannot be connected to the direction of explosion of the detonating tube. 3. Establish a good detonation network. In order to prevent the influence of stray current on the network, we should carefully check the surrounding area to ensure that there are no metal objects on the surface. 4. After inserting the detonator into the cassette, fasten the detonator and the cassette with a rope. When handling primary explosives, the detonator must be placed in the reserved hole of the primer. The ban came out of the explosive tube. 5. After all filling operations are completed, the connection between the surface detonator detonation networks should be gradually carried out from the end of...

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Classification of water well drilling rigs(V)

June 27 , 2022

Water well drilling rigs can generally be classified by various methods such as assembly form, drilling depth, driving equipment type and drilling process. 1. Divided by drilling depth Water well drilling rigs can be divided into the following categories according to the drilling depth: 1. Shallow well drilling rig: the drilling depth is not more than 300 meters 2. Medium-deep well drilling rig: drilling depth in the interval of 300-800 meters 3. Deep well drilling rig: drilling depth is in the interval of 800-2000 meters 4. Ultra-deep well drilling rig: drilling depth exceeding 2000 meters  

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Classification of water well drilling rigs(IV)

June 17 , 2022

At present, there are 1,000 water well drilling rig manufacturers in my country, more than 400 water well drilling rig manufacturers, and more than 100 types of drilling rigs. The construction fields involve agricultural irrigation, industrial water wells, civil drinking water wells, geothermal wells, dewatering wells, water collection wells, Ground source heat pump wells and other fields of the national economy.

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Percussion Type Drilling Rig Machine

June 17 , 2022

Percussive drilling rigs, also known as percussive drilling, are divided into two methods: drill pipe percussion drilling and wire rope percussion drilling. The wire rope percussion drilling method is generally used in water well construction. It uses a drill bit with a certain weight to periodically impact the bottom of the well within a certain height to break the rock formation. After each impact, the drill bit or the pumping cylinder is driven by the wire rope to rotate at a certain angle, so that the drilling can get regular drilling. circular section. In the construction of water wells, this method is mainly used for the drilling of water wells with weak water-bearing formations and larger diameters, and the drilling effect is better in pebble, gravel layers and dense bedrock layers. For drilling in Quaternary strata, I-shaped drill bits and barrel drill bits are mostly used, and cross-shaped drill bits or round drill bits are mostly used in bedrock layers. Although percussion drilling is slow and inefficient, it has the advantages of simple equipment, large diameter of wells and low cost, which can better meet the construction needs of larger diameter shallow machined wells in water-deficient areas. Percussion drilling is...

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Classification of water well drilling rigs(III)

June 11 , 2022

The purpose of water well construction is to provide water supply wells, and its value is generally less than that of oil wells or solid deposit drilling. Generally, the investment in equipment is low, and the engineering cost is low. Exploration boreholes are generally underground temporary structures drilled for the purpose of reconnaissance. They are used to obtain geological data and boreholes for testing. The purposes of the two are different and should not be confused.

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Classification of water well drilling rigs(II)

June 02 , 2022

Generally, the machinery that can be used for the drilling of water supply pipe wells is the water well drilling rig. The water supply pipe well is a long-term groundwater intake structure, and it is a well built for water supply. It is different from the general exploration hole and requires a larger diameter, with a specific well structure, well pipe and filter pipe. Except for deep wells and geothermal wells, which require large drilling rigs, small and medium-sized drilling rigs are generally used for water well drilling. In addition, the well construction period is short, the fluidity is large, and the relocation is frequent, and the drilling equipment required should not be too bulky.

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